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. 2021 May 19;8(1):e000590. doi: 10.1136/bmjgast-2020-000590

Table 1.

Demographics and baseline characteristics of COVID-19 patients according to SARS‐CoV‐2 RNA detection in anal swab

Characteristics All Patients
(136) n (%)
Patients with positive
nasopharyngeal swab SARS-CoV-2 (120) n (%)
Patients with positive anal
swab SARS-CoV-2 (45) n (%)
Age, year (mean±SD) 44.41±12.72 44.17 ± (12.35) 45.31 ±(13.26)
 <40 n (%) 48 (35.3) 47 (39.2) 16 (35.6)
 40–60 n (%) 71 (52.2) 56 (46.7) 24 (53.3)
 >60 n (%) 17 (12.5) 17 (14.2) 5 (11.1)
Sex
 Male, n (%) 66 (48.5) 59 (49.2) 24 (53.3)
 Female, n (%) 70 (51.5) 61 (50.8) 21 (46.7)
Comorbidity
 No comorbid 53 (39) 48 (40) 22 (48.9)
 <2 63 (46.3) 57 (47.5) 18 (40)
 ≥2 20 (14.7) 15 (12.5) 5 (11.1)
Habits
 Exercise, n (%) almost never 64 (47.1) 52 (43.3) 23 (51.1)
 Lack of exercise (<3x/ week,<30 min/session) 72 (52.9) 68 (56.7) 22 (48.9)
Smoking, n (%)
 Never 115 (84.6) 101 (84.2) 38 (84.4)
 Active smokers 15 (11) 14 (11.7) 4 (8.9)
 Former smokers 6 (4.4) 5 (4.2) 3 (6.7)
Body mass index
 <18.5 5 (3.7) 3 (2.5) 0 (0)
 18.5–24.9 69 (50.7) 61 (50.8) 30 (66.7)
 ≥25 62 (45.6) 56 (46.7) 15 (33.3)
Radiologic findings
 Pneumonia, n(%) 100 (73.5) 90 (75) 38 (84.4)
Clinical outcome
 ARDS, n (%) 17 (12.5) 14 (11.7) 7 (15.6)
 ICU referral, n (%) 20 (14.7) 18 (15) 8 (17.8)
 HFNO, n (%) 14 (10.3) 12 (10) 4 (8.9)

ARDS, acute respiratory distress syndrome; HFNO, high-flow nasal oxygen; ICU, intensive care unit.